40.20 DIS ballot initiated: 12 weeks Sep 10, 2026
CEN
CEN/TC 164 Water supply
European Norm
91.140.60 Water supply systems
Draft
This document specifies dimensions, materials and performance requirements, including methods of test, for pressure safety valves, of nominal sizes from DN 15 to DN 40, having working pressures from 0,1 MPa (1 bar) to 1,0 MPa (10 bar).
Pressure safety valves are intended for fitting to the potable water supply of storage water heaters, having a maximum storage temperature of 95 °C.
Pressure safety valves limit the pressure in hot water heaters.
Pressure safety valves do not control the temperature and alone do not constitute the protection required for storage water heaters. They are not intended to act as expansion valves under normal conditions.
NOTE The use of the device specified in this document does not override the need to use controls (e.g. thermostats and cut-outs) which act directly on the power sources of water heaters (for more information see Annex A).
Legislation related to this standard
Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
PUBLISHED
EN 1489:2000
IN_DEVELOPMENT
prEN 1489
40.20
DIS ballot initiated: 12 weeks
Sep 10, 2026
